Messages in this thread Patch in this message | | | From | Krzysztof Kozlowski <> | Subject | [PATCH v4 2/4] amba: Add helper macros for (un)preparing AMBA clock | Date | Tue, 16 Sep 2014 10:51:32 +0200 |
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Add amba_pclk_prepare() and amba_pclk_unprepare() macros for handling the AMBA bus clock by device drivers.
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com> --- include/linux/amba/bus.h | 6 ++++++ 1 file changed, 6 insertions(+)
diff --git a/include/linux/amba/bus.h b/include/linux/amba/bus.h index fdd7e1b61f60..ad52027a9cbf 100644 --- a/include/linux/amba/bus.h +++ b/include/linux/amba/bus.h @@ -92,6 +92,12 @@ void amba_release_regions(struct amba_device *); #define amba_pclk_disable(d) \ do { if (!IS_ERR((d)->pclk)) clk_disable((d)->pclk); } while (0) +#define amba_pclk_prepare(d) \ + (IS_ERR((d)->pclk) ? 0 : clk_prepare((d)->pclk)) + +#define amba_pclk_unprepare(d) \ + do { if (!IS_ERR((d)->pclk)) clk_unprepare((d)->pclk); } while (0) + /* Some drivers don't use the struct amba_device */ #define AMBA_CONFIG_BITS(a) (((a) >> 24) & 0xff) #define AMBA_REV_BITS(a) (((a) >> 20) & 0x0f) -- 1.9.1
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